Machine for cutting ovals.



ma /7,422. PATENTED JAN. 21, 1908.

W. E. HERMAN.

MACHINE FOR CUTTING OVALS.

APPLICATION FILED JULY 5. 1907.

2 SHEETEk-SHEET 1.

Inuezzr iii/Admit Her/22a.

PATENTED JAN. 21, 1908.

W. E. HERMAN.

MACHINE FOR CUTTING OVALS.

APPLICATION FILED JULY 5. 1907.

2 MEETS-SHEET 2.

Wit" woes STT rarer union WILLIAM E. HERMAN, (DF ALLEGHENY, PENNSYLVANIA, ASSIGNOR OF ON E-HALF TO ROLAND MAGGREGOR, OF KNOXVILLE BOROUGH, PENNSYLVANIA.

MACHINE FOR CUTTING OVALS.

, Specification of L'etters Patent.

Patented Jan. 21, 1908'.

Application filed July 5. 1907.- Serial No. 382.300.

T all whom it may concern:

Be it known'that I, WILLIAM E. HERMAN, a citizen of the United. States of America, residing at Allegheny, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Machines for Cutting Ovals, of which the following is a specification, reference being had'therein to the accompanying drawing. v

. This'invention relates to a machine for cutting ovals, the machine being designedhave devised a machine somewhat upon the-- principle of a vertical lathe, wherein an adjustable cutter head is used together with.

an adjustable work support, which isset to automatically move a piece of work beneath the cutter head and describe anovalor ell ilps'e having true and predetermined axes.

1e detailed construction enteringinto my invention will be presentlydescribed, and reference will now be had to the accompanying drawings, in which,

Figure 1 is an elevation of amachine constructed in accordance with my invention. Fig. 2 is a plan ofthe same. Fig, 3 is a plan of a ortion of a machine illustrating the movab e platform thereof. Fig. 4 is a longitudinal sectional view of the same, and Fig. 5 is a cross sectional view. a

1 construct the machine of a base plate or foundation 1 having at its one end a post or standard 2 provided with a vertically disposed dove-tail tongue 3 and with'a vertically disposed rack .4. Slidabl mounted upon the tongue 3.is an outwar ly extending arm 5 having a longitudinally disposed slot or groove 6 formed therein. The arm'5 is adjusted with relation to the post or standard 2 by a pinion 7 carried thereby, meshing with, the rack 4, said pinion. being rotated by j In this connection,

mounted in hangers 11, carried by the arm 5; The outer'end of the arm- 5 is provided with a dial 12, in front of which rotates a crank 14 carried by the screw 10 for adjusting the housing 9 through the medium of the screw 10. The crank 14 carries an indicator or pin 15 for determining the position of the housing 9. Journaled inthe housing 9 is a vertica ly disposed shaft 16 carrying upon itslower end a cutter head 17, while its upper end is provided with a beveled ge'ar wheel 18 meshing'with a beveled gear wheel 19 slid ably keyed upon a shaft 20 journaled in bearings 21,-carried by the arm 5. The beveled gear wheel 19, besides sliding upon the shaft 20, is adapted to rotate therewith, and is normally held in engagement with the bevs eled gear wheel 18 by a bracket 22 carried by the upper end of the housing 9.

The inner end of the shaft 20 is provided similar wheel 24, this wheel 24 being revoluarin"5a gassing through the bracket 25 and the beveledgear wheel 24 is a vertically disosed shaft 26, said shaft being keyed to the eveled gear wheel 24, whereby said gear wheel will rotatex'withsaid shaft and at the same time permit of the arm 5 and its appur tenant partsremainingoperatively connected to the shaft 26. The shaft 26 is ournaled in bearings 27 carried by the post or standard 1 at one side of the arm 5,'whereby said shaft will not interfere with the vertical adjustment of the arm 5. The lower end of the shaft 26 carries a beveled gear wheel 28 meshing with a similar wheel 29 mounted upon a driven shaft 30, saidshaft being. journaled in a bearing 31 carriedby the base plate or foundation 1 of the machine. The shaft can be driven by a motor (not shown) or from any source of power.

is a support 33, said support extending outwardly beneath the adjustable arm 5, and be'-' ing apertured to receive the shaft 26. The support 33 is slotted, as at 34, and provided with a longitudinally disposed groove 35 for stem 37 provided with a threaded opening 38. Extending through the threaded opening 38 is a screw 39 revolubly mounted in hangers 40, carried by the support The outer end of the screw 39 carries a crank 41 having an indicator or pin 42 for engaging a with a beveled ge'an wheel 23 meshing with a p bly connected to a bracket '25 carried by the 1 Secured to the standard or post 2, as at 32, I

a block 36, said block having a depending dial 43, similar to the crank 14 and the dial 12 of' the arm the dial 43 being carried by the support 33. The dial 4S determines the position of the block 36 and the parts carried thereby. Centrally of the support 33 and over the groove 351s mounted a circular plate 44 having a slot 45 for a post 46, carried by the block 36. Surrounding the plate 44 is a revoluble band 47 carrying two parallel guides 48, and resting upon said guides are parallel angle bars 49 carrying a table 50. I The bottom of the table 50 is provided with a longitudinally disposed groove 51 to receive a head 52 fixed upon the post 46, as at 53. The table is cut away, as at 54, to clear the upper end of thepost 46, and is provided with a central opening 55.

The table 50 is revolved by a belt 56 pass ing around the revoluble band 47, said belt belng driven from a suitable source of power, or, its mechanical equivalent can be used for imparting a rotary movement to the table 50. This table has been illustrated as oval in plan, but the same can be made of any desired shape as long as it clears the post or standard 2 during its rotary movement, irrespective the position it may be adjusted to.

In operation, the adjustment of the housing Qdetermine's the major axes of the ellipse or oval to be out by the head 17, while'the adjustment of the table 50 determines the minor axes of an oval or ellipse. The piece of work 1 to be operated upon is placed upon the table 50 and can be suitably secured thereto by clamps (not shown) or similar fastening means. When the screw 10 has been adjusted through the medium of the crank 14, to determine the major axes of the oval to be cut from the material upon the table 50,the arm 5 is ready to be lowered to place the cutter head 17 in engagement with the material vupon the table. The minor axis of the ellipse is now determinedby adjusting the screw 39 through the medium of the crank 41. The left hand endsof the slots 34 and 45 aline with the central opening of the table 50,

I consequently when the block 36 is adjusted the material on the table, the major and the cutter head 17 remains stationary, the.

table 50 and material thereon is guided, causing the cutter-head to describe anovalu'pon minor axes of the oval having been previously determined by the adjustment of the cranks l4 and 41.-

I attach considerable importance to the novel construction of the support 33 and its adjustable and movable table, as themovements .of this table with relation to a station ary cutter head determines the exact size of an oval. 4 v

The major axis of an ellipse is limited by the length of the scrrew 10 and the slot 6, while the minor axis is limited by the len th of the slot 34. His therefore apparent t at the size of an oval entirely depends upon thesize of the machine, large machines producovals.

Having fully described my invention, what is :v

1'.- In an oval cutting machine, the combination of an adjustable slotted arm an adjustable housing carried by said arm, a shaft j ournaled in said housing, a cutter head I claim and desire to secure by Letters Patent 'ing large ovals and small machines small carried thereby, a support located beneath I said arm, said support having a groove and slot formed therein, a block adjustably mounted in thegroove of said support, in slotted late mounted upon said support, a revolubie band surrounding said plate,

guides secured to said band, a post carried by.

said block and extending through the'slot'of said late, a head carried by said post, a table slida ly mounted upon said head and-upon said guides, and means for rotating said shaft. 2. In an oval cutting machine, the combination, with an adjustable rotary cutter, head, of a support located beneath said head,

said support having a groove formed therein,

a block adjustably mounted in said groove, a slotted plate mounted upon said support, a revoluble band surrounding said plate, guides carried by said band, a post carried by said block and extendingthrough said plate,

.in said support, a band revolubly mounted upon said support, guides carriedv by said band, a revoluble head 'supported' by said block, and a table slidably mounted upon said guides and said head.

4. In an oval cutting machine, the combination with. a cutter head, of a support, a

revoluble ring concentrically mounted upon said support, a revoluble. head adjustably supported from said su ort, guides carried by said band, and a ta l uponsaid head and said guides.

5. A. table for cutting machines, embodye slidably mounted x ing a stationary support provided with a slot.

and having a recess in its upper face, a block movably mounted in said recess and having a stem projecting through said slot, a screw 9 carried by the support and engaging said mg a groove to means carried by the arm and engaging the stem for adjusting said b10ck,'a slotted plate I mounted on said block and support; a post carried by said block and-projecting through the slot insaid plate, a head carried b sald post, a table mounted on said head an "hav- 1 receive the latter, andmeans' for rotating said plate and thereby imparting rotanin movement to the table.

. 6.- bination with a su ort, of an arm carried by said support and adjustable Vertically there-. on, a housing carried by the arm and adjust-" able towards and away from the support,

- supiport, and separate sal . v v the cutter head an oval cutting, machine, the com hous" .for adjustin' the. latter on the'ar'm, a 15.

cutte fiead carried y said housing. means for operating said cutter head, a ta 1e support connected to the first mentio iedsu port, a tablerotatably mou'ntedorl said t'ab e means for rota'tin 2r table on its support indeperidentlyv 0% ro'tat' means. m v

In testimony 'whereo' -I aflix my signature in the presence of two Witnesses. a

v WILLIAM E. HERMAN.

' Witnesses:

Max .H. SBOLOVITZ, H. O, EYERT. 

